What is the recommended agent used when recharging a fire extinguisher?

When recharging a fire extinguisher, it is crucial to use the type of agent that is specifically recommended by the extinguisher manufacturer. This is because different types of fire extinguishers are designed to combat different classes of fires, and using the wrong agent can be ineffective or even dangerous. The manufacturer will provide guidelines based on the fire extinguisher's composition, the agent's properties, and the intended use.

For instance, a water extinguisher is suited for ordinary combustibles, but using it on electrical fires or flammable liquids could make the situation worse. Similarly, with chemical agents or foams, their properties and compatibility with the materials involved in a fire must be considered to ensure proper extinguishing capabilities. Therefore, following the manufacturer's recommendations ensures that the extinguisher will function correctly and safely in an emergency situation.